Filter press type electrolytic cell and frames for use therein.

摘要

A filter press type electrolytic cell (11) for the electrolysis of brine to produce chlorine and caustic includes a plurality of rectangular frames (13, 15) having U-shaped or channel-shaped wall members (91, 93, 95, 97), the open sides of each of which wall members face inwardly, and a downcomer tube (111) in each frame (13,15) for conducting product from near the top of the frame (97) to the bottom (93) thereof for withdrawal. The downcomer tubes (111) are located near a framing side (95) but are not within a framing channel. The openings of the wall members (91, 93, 95, 97) are partially covered by cross members (101, 104, 109) of the same material as the framing to improve the resistance thereof to distortion during closing of the cell (11). Utilization of the dawncomer tubes (111), preferably of polytetrafluoroethylene for the catholyte compartment and titanium or titanium clad material for the anolyte compartment, allows the maintaining of the framing channel open so that inner walls thereof are electrolytically protected against corrosion. The invention also relates to frames (13, 15) for use in filter press type electrolytic cells (11) and to a method of electrolyzing, wherein such frames (13, 15) and cells (11) may be employed.